JP2000132633A - Optical information reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the reading work efficiency by irradiating with proper guiding light, in an optical information reader. SOLUTION: A guiding light irradiation part 40 is provided in a case 5 forming a reading window 5a. The part 40 is provided with a high luminance light emitting diode 41, a lens 42 and a hole board 43 and visible light emitted from the diode 41 is condensed by the lens 42 and passes through a hole 43a formed at the board 43 to be projected as guiding light to a scanning range formed by an optical reading part 8. At this time, the visible light as the guiding light emitted from the diode 41 in particular is provided with a wave length different from that of light for reading emitted from the laser diode 12 of the part 8 does not pass an optical filter 19 and entering a photodiode 20. Consequently, it is not required to turn off guiding light in a reading period and a scanning range is securely grasped at the time of reading.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information reading apparatus which irradiates a reading object such as a bar code label with light and reads information to be read from the reflected light.

[0002]

2. Description of the Related Art
From a reading window provided in the apparatus, for example, scanning light such as laser light is emitted toward a reading target such as a bar code label,
2. Description of the Related Art There is known an optical information reading apparatus that reads information of a reading target by reflected light from the reading target.

Some of such optical information reading devices include:
In some cases, an object to be read that is several cm to several tens cm away from the reading window can be read. Such an apparatus is, for example, a stationary counter installed on a cashier counter or a conveyor on which articles are conveyed, or it is difficult to move articles to be read due to heavy weight or the like. In such a case, a portable type (hand-held type) which can be used in a hand is known.

In such an optical information reading apparatus for reading information to be read at a certain distance from the reading window, for example, in the case of a stationary type apparatus, an article to which the read object is added is moved to read the information. Must be adjusted to the scanning range by the scanning light. Further, in the case of a portable device, it is necessary to move the device itself and adjust the scanning range by the scanning light to the reading target added to the article. Generally, the scanning range of the scanning light emitted from the reading window is projected as a scanning line on the article because the scanning light is red visible light. For this reason, the user adjusts the scanning line to a reading target such as a barcode.

However, in a situation where the surroundings are relatively bright or the like, the scanning line becomes difficult to visually recognize. Also,
It is known that red visible light has low visibility. As a result, a situation arises in which the reading target such as a barcode cannot be quickly adjusted to the scanning range by the scanning light, which causes a reduction in reading work efficiency.

As one method for solving this problem, it is conceivable to provide a guide light source for irradiating the scanning range. However, if the wavelength of the guide light for irradiating the scanning range is the same as the wavelength of the light for reading, the reflected light of the guide light is sensed by the optical sensor in the apparatus in the same manner as the light for reading, and the reading is performed. The target information cannot be read accurately. Therefore, at the time of reading, it is necessary to control to turn off the guide light. For example, during the reading period in which the trigger switch for instructing reading is pressed, the guide light is turned off, or the guide light is turned off only during a period during which the signal from the optical sensor is valid during the reading period. It is to do. In the former case, the reading range is not guided at all during the reading period. Even in the latter case, the on / off of the guide light is repeated during the reading period, so that the guide light appears dark to the eyes of the user. Therefore, the reading operation efficiency has not been significantly improved.

The present invention has been made to solve such a problem, and an object of the present invention is to improve reading operation efficiency by irradiating appropriate guide light.

[0008]

In the optical information reading apparatus according to the present invention, the first light emitting means emits light for reading, and the light for reading is emitted by the irradiating means. Irradiates the object to be read. For example, the first light emitting means is configured using a laser diode,
The laser light from the laser diode is scanned by an irradiating unit constituted by a polygon mirror or the like that is driven to rotate, and is irradiated onto a reading target. Then, the light receiving unit receives the reflected light from the reading target, and as a result, the information of the reading target is read. Here, the light receiving means includes, for example, a concave mirror (or a convex lens), an optical filter, a photodiode, and the like, and normally, the reflected light condensed by the concave mirror (or the convex lens) enters the photodiode via the optical filter. I do. Therefore,
Only reflected light of a predetermined range of wavelengths transmitted through the optical filter is incident on the photodiode.

The object to be read is not limited to a one-dimensional code such as a bar code, but may be a two-dimensional code.
At this time, the reading means irradiates the entire reading object with light for reading, and the reflected light is read by the light receiving means including a CCD image sensor or the like.

Here, in the optical information reading apparatus of the present invention, the second light-emitting means has a wavelength different from that of the light from the first light-emitting means and emits visible light which is not received by the light-receiving means. I do. This light is emitted as guide light indicating a reading range by the light irradiated by the above-described irradiation means. Here, the visible light having a wavelength not received by the light receiving means may be, for example, visible light having a wavelength not detected by the photodiode if the light receiving means has a photodiode. If the light receiving means has an optical filter as described above, the light may be visible light having a wavelength that does not pass through the optical filter.

In the optical information reading apparatus of the present invention, since the light having the wavelength not received by the light receiving means is used as the guide light, there is no need to control the extinguishing of the guide light during the reading period. In other words, there is no restriction on the timing of the application of the guide light by the second light emitting means. That is, even during the reading period, it is possible to continuously irradiate the guide light indicating the reading range, and if the user performs the reading operation using this guide light, the reading operation efficiency can be improved. it can.

In this way, it is not necessary to turn off the guide light during the reading period, so that the reading range can be illuminated brightly. It is more preferable to use light having a wavelength having the same visibility.

Conventionally, it has been known that visible light of the same energy, particularly blue or green visible light, has high visibility. Therefore, if the visible light having blue, green or equivalent visibility is emitted as the guide light, the visibility of the guide light can be further improved, and the reading work efficiency can be more reliably improved. I do.

It is to be noted that the second light emitting means may be a third light emitting means.
As shown in (1), it is conceivable to use a light emitting diode. For example, high-brightness light-emitting diodes that emit blue and green light, for example, have recently been provided at low cost. Therefore, using such a light emitting diode, the second
With this configuration, it is possible to suppress an increase in cost associated with providing a new light source.

Further, from the viewpoint of suppressing an increase in the cost of the optical information reading apparatus, it is conceivable to employ the configuration described in claim 4. That is, the configuration is the second
Are configured to emit guide light and to indicate the operating state of the apparatus by turning on and off the guide light.

In the conventional optical information reading apparatus, the operating state of the optical information reading apparatus such as whether the reading is normally performed, and whether the power is turned on or not and the like, is changed by turning on the light emitting diode. It is common to notify outside. Therefore, the second light emitting means is configured to also indicate the operation state of the device. As described above, with respect to the reading operation, there is no limitation on the light emission timing of the second light emitting unit. Therefore, if the emission timing of the light from the second light emitting means is controlled in accordance with the operation state of the optical information reader, the operation state of the optical information reader can be notified. For example, when the optical information reader is powered on and operating, the second light emitting means always emits light, and when reading is performed normally, the light from the second light emitting means is momentarily output. This is to prevent light from being emitted.

If the second light emitting means also serves as a light source for notifying the operating state of the apparatus, it is not necessary to provide a light source for notifying the operating state.
It is possible to further suppress an increase in the cost of the optical information reading device. By the way, conventionally, a stationary optical information reading apparatus generally scans an object to be read in a plurality of line directions. For example, when a barcode attached to an article is read at a cash register or the like, the possibility of reading the barcode regardless of the arrangement direction of the barcode is increased.
Conventionally, in such an optical information reading apparatus, since the guide light has been irradiated in a substantially circular shape over the entire scanning range, the user appropriately holds the barcode within the irradiation area of the guide light. Therefore, if the arrangement direction of the barcodes does not match any of the plurality of line directions to be scanned, the barcode may not be read.

Therefore, it is assumed that the irradiating means irradiates the object to be read with light of a multi-scan pattern obtained by sequentially scanning the light from the first light emitting means in a plurality of line directions. Then, it is conceivable that the second light emitting unit is configured to emit guide light indicating a predetermined line direction among a plurality of line directions together with the reading range. For example, the guide light is emitted so as to overlap the scanning range of the laser light in the predetermined line direction. As a means for realizing this, specifically, the second light emitting means is configured using a slit or a lens, and the light from the light source is emitted to the outside through the slit or the lens, so that the irradiation range of the guide light is reduced. It is conceivable to overlap the scanning range in the predetermined line direction.

According to this structure, the user can know that the scanning is performed in the predetermined line direction together with the reading range. Therefore, the user can surely align the bar code arrangement direction with the scanning direction. It can read barcodes. As a result, the reading operation efficiency is improved. The predetermined line direction may be, for example, all of the plurality of line directions.

The optical information reading apparatus for scanning the object to be read in a plurality of directions as described above uses a polygonal reflecting mirror having a plurality of mirror surfaces, and reads the object in a plurality of line directions through each mirror surface. Is generally scanned. Here, the irradiation angle of the reading light, the length of the optical path, and the amount of condensed light differ in a plurality of line directions due to differences in the position, angle, and the like of each mirror surface. Therefore, the reading performance in each line direction is not uniform.

Therefore, as set forth in claim 7, claim 5
In the configuration shown in (1), it is conceivable that the predetermined line direction is the direction with the highest reading performance among the plurality of line directions. This allows the user to know the scanning direction having a high reading performance, so that the barcode can be read more reliably by adjusting the barcode arrangement direction to the scanning direction. Also, the reading operation efficiency can be improved.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram illustrating a schematic configuration of a barcode reading device (hereinafter, referred to as a “scanner”) 1 according to an embodiment to which the present invention is applied. The barcode reading device 1 is a stationary device that reads a barcode by scanning a laser beam using a polygon mirror and a polygon mirror.

As shown in FIG. 1, the scanner 1 of the present embodiment accommodates an optical device section 8 for reading a bar code in a case 5 so that the bar code can be read alone. Has become. The case 5 has a substantially rectangular parallelepiped shape having four side surfaces. On the upper side of one side, a laser beam for reading a bar code emitted from the optical device section 8 is emitted to the outside, and the reflected light is reflected by the optical device when the laser beam hits an external bar code. A reading window 5a for entering the unit 8 is formed. A display window 5b for displaying the operation state of the scanner 1 is formed above a surface facing the surface on which the reading window 5a is formed, and a power supply to the scanner 1 and an optical device are formed below the display window 5b. A code 6 for transmitting the information read by the unit 8 is connected.

Here, the optical device section 8 in the case 5 will be described. As shown in FIG. 2, the optical device section 8 reflects a laser diode 12 that emits a red laser beam for reading a bar code, a plane mirror 13 that reflects the laser beam emitted from the laser diode 12, and a plane mirror 13 that reflects the laser beam. A four-sided polygon mirror 14 for scanning laser light in a predetermined line direction and emitting the light from the reading window 5a to the outside, a driving motor 16 for rotating and driving the polygon mirror 14, and a laser light emitted from the reading window 5a. Concave mirror 1 for collecting reflected light
8, an optical filter 19 for transmitting only light of a predetermined range of wavelengths among the reflected light condensed by the concave mirror 18, a photodiode 20 for receiving reflected light transmitted through the optical filter 19, and converting the reflected light into an electric signal; Is provided.

Here, the polygon mirror 14 has a substantially rectangular parallelepiped shape in which four mirror surfaces 14a to 14d are arranged on side surfaces. The inclination angles of the mirror surfaces 14a to 14d with respect to the rotation axis of the polygon mirror 14 (that is, the inclination angles of the mirror surfaces 14a to 14d) are set to be different from each other. The rotation axis of the polygon mirror 14 is connected to a drive motor 16, and the polygon mirror 14 is driven to rotate in one direction by the rotation of the drive motor 16. In addition, each mirror surface 22 of the multi-sided reflecting mirror 22
a to 22e are arranged in a fan shape.

In the optical device section 8, the laser light emitted from the laser diode 12 is applied to a polygon mirror 14 which is driven to rotate by a drive motor 16, as indicated by a dashed line in FIG. Then, the laser light reflected by each of the mirror surfaces 14a to 14d with the rotation of the polygon mirror 14 is swung in the rotation direction of the polygon mirror 14, and all the mirror surfaces 22a to 22e of the polygon mirror 22 are rotated.
Is irradiated. Then, the laser light is reflected on each of the mirror surfaces 22a to 22e of the polyhedral reflecting mirror 22 in different directions, and as shown in FIG. 3, the scanning of the multi-scan pattern sequentially scanned in a plurality of line directions having different positions and angles. The light is emitted from the reading window 5a as light.

The four parallel scanning lights in each set of scanning lights shown in FIG. 3 are formed by four mirror surfaces 14 a to 14 d of the polygon mirror 14. Each of the mirror surfaces 22a to 22e of the polygonal reflecting mirror 22 reflects the laser light from each of the mirror surfaces 14a to 14d of the polygon mirror 14, so that a set of four scanning lights is formed as shown in FIG. Divide into five sets. Therefore, if each of the mirror surfaces 14a to 14d of the polygon mirror 14 has the same surface inclination angle, four sets of each group are emitted to the same position. Above, one by one.

On the other hand, the laser beam emitted from the reading window 5a as described above is reflected by the article if there is an article ahead. Then, a part of the reflected light enters the case 5 through the reading window 5a, and contrary to the emission of the laser light,
After being reflected by any one of the mirror surfaces 22a to 22e of the polygon mirror 22, the mirror surface 14a of the polygon mirror 14 is
To 14d. Then, the reflected light passes through the optical filter 19 via the concave mirror 18 and enters the photodiode 20.

Therefore, when a laser beam is emitted from the reading window 5a, there is an article in front of the reading window 5a, and when the laser beam is reflected by the article, a part of the reflected light is converted into the photodiode 20. Will be incident. If the reflected light is from the bar code BC attached to the article, the output level from the photodiode 20 changes according to the width and interval of the bar of the bar code BC. From the change pattern of the output signal of
The bar code BC can be read.

The optical reading unit 8 is a polygon mirror 14
Although there is provided a configuration for detecting the rotation angle of the optical reading unit 8 (not shown), the configuration of the optical reading unit 8 is well known in the related art, and a detailed description is omitted. In FIG. 1, the red laser light emitted from the laser diode 12 is:
The figure shows a state where the light is sequentially reflected by the plane mirror 13, the polygon mirror 14, and the mirror surface 22 c of the polygon mirror 22 and emitted to the outside. Here, the manner in which the reflected light is collected is omitted to avoid complicating the drawing.

As a characteristic part of the scanner 1 of this embodiment, as shown in FIG. 1, a guide light irradiating section 40 is provided behind the optical device section 8 in the case 5, that is, on the side opposite to the reading window 5a side. Is provided. This guide light irradiation unit 4
Numeral 0 includes a high brightness light emitting diode 41, a lens 42, and a hole plate 43. In the present embodiment, the guide light irradiating section 40 is disposed behind the optical device section 8. However, as will be described later, the guide light from the guide light irradiating section 40 emitted from the reading window 5a is, for example, an optical device. The location is not particularly limited as long as the position is not interrupted by the components of the unit 8 and does not hinder the scanning of the laser beam by the optical device unit 8 and the reception of the reflected light.

The high-brightness light emitting diode 41 is disposed at the rear center of the case 5 so as to emit light upward, and emits blue visible light having a wavelength different from that of the laser diode 12 of the optical reading unit 8 described above. Emit. The wavelength of the light emitted from the high-brightness light emitting diode 41 is a wavelength that does not pass through the optical filter 19 of the optical reading unit 8 described above.

A lens 42 is disposed above the high-brightness light emitting diode 41, and the light emitted from the high-brightness light emitting diode 41 is condensed by the lens 42 and emitted to the outside. The lens 42 has an inclined surface 42a at an upper portion thereof, and most of the light from the high-brightness light emitting diode 41 incident from the lower portion of the lens 42 is reflected by the inclined surface 42a and emitted toward the reading window 5a. Is done. Also, lens 4
Reference numeral 2 denotes a display window for notifying the operation state of the scanner 1
Part of the light is inserted into the display window 5b, and a part of the light from the high-intensity light emitting diode 41 is emitted from the display window 5b to the outside.

The hole plate 43 is arranged on the reading window 5a side with respect to the lens 42. The hole plate 43 is formed with a substantially elliptical hole 43a for limiting the light irradiation area, and the light emitted from the high-brightness light emitting diode 41 in the direction of the reading window 5a via the lens 42 is The light is emitted from the reading window 5a to the outside through the hole 43a formed in the hole plate 43, and has an elliptical shape overlapping the scanning range of the optical reading unit 8 as shown by a two-dot chain line in FIG. The area is irradiated.

The high-intensity light-emitting diode 41 of the guide light irradiating section 40 is, as a rule, always lit while the scanner 1 is powered on and the scanner 1 is operating. Therefore, the optical reading unit 8 as described above
Is also turned on during the bar code reading period. When the bar code is normally read by the optical reading unit 8, the light is turned off for a moment. As a result, the user can determine whether or not the scanner 1 is powered on and the scanner 1 is operating, and whether or not the bar code has been read normally, by displaying the operating state of the scanner 1 from the display window 5b. It can be known from the light of the luminance light emitting diode 41.

Next, the effects exhibited by the scanner 1 of this embodiment will be described. In the scanner 1 of the present embodiment, a guide light irradiating unit 40 that irradiates guide light that overlaps the scanning range of the optical reading unit 8 as indicated by a two-dot chain line in FIG. 4 is provided. Here, the light (guide light) emitted from the high-intensity light emitting diode 41 of the guide light irradiation unit 40 is transmitted to the optical reading unit 8.
The wavelength does not pass through the optical filter 19. Therefore, the reflected light of the guide light does not enter the photodiode 20. Therefore, it is not necessary to turn off the high-intensity light emitting diode 41 even during the barcode reading period by the optical reading unit 8. That is, there is no restriction on the timing of turning on and off the high-brightness light emitting diode 41 of the guide light irradiation unit 40. That is, even during the reading period by the optical reading unit 8, it is possible to continuously irradiate the guide light indicating the reading range, and if the user performs the reading operation using this guide light,
Reading work efficiency can be improved.

Further, the high-intensity light emitting diode 41 of the guide light irradiation section 40 emits blue visible light having high visibility. Compared with visible light of the same energy, blue and green visible light have high visibility. Therefore, the visibility of the guide light is further improved, and the user can surely recognize the irradiation area of the guide light, so that also in this respect, the reading operation efficiency can be improved.

Further, in the conventional scanner, a reading light is provided so that a user can grasp the operating state of the scanner, such as whether or not reading has been normally performed and whether or not the scanner is turned on and operating. A light source different from the light source that emits light is provided. On the other hand, in the scanner 1 of the present embodiment,
The high-intensity light emitting diode 41 of the guide light irradiation unit 40 is used as a light source for indicating the operation state of the scanner 1. This is because, as described above, there is no limitation on the timing of turning on and off the high-brightness light emitting diode 41 of the guide light irradiation unit 40. As described above, since the high-brightness light emitting diode 41 of the guide light irradiation unit 40 also serves as a light source for notifying the operation state of the scanner 1,
It is not necessary to newly provide a light source for notifying the operation state.

In addition, as the light source of the guide light irradiating section 40, a high-brightness light emitting diode 41, which has been provided relatively inexpensively in recent years, is used. Therefore, an increase in the cost of the scanner 1 can be suppressed, which is advantageous in terms of economy.

As described above, the present invention is not limited to such embodiments at all, and can be implemented in various forms without departing from the gist of the present invention. For example, in the above-described embodiment, a substantially elliptical hole 43a is formed in the hole plate 43 of the guide light irradiation unit 40, and light from the high-intensity light emitting diode 41 is irradiated through the hole 43a to perform optical reading. Although the guide light is applied to a substantially elliptical area overlapping the scanning range of the barcode by the unit 8, the irradiation area of the guide light may have any other shape, for example, a rectangular shape. Good. further,
The guide light irradiation area may be modified as follows.

In the above embodiment, the user holds the barcode added to the article over the irradiation area of the guide light. At this time, the barcode is oriented in an appropriate direction. . However, the optical reading unit 8
It is also conceivable that the arrangement direction of the barcodes to be read does not match any of the five line directions scanned by the scanner, and that the barcode information cannot be read.

Therefore, the hole plate 4 of the guide light irradiation section 40
By devising the shape of the hole to be formed in 3, 5
It is also possible to irradiate the guide light so as to overlap each scanning range in each of the two line directions. For example, as shown by a two-dot chain line in FIG. In this way, the user
Since the scanning direction by the optical reading unit 8 can be known together with the reading range, the barcode can be reliably read by matching the barcode array direction with the scanning direction. As a result, the reading operation efficiency is improved.

In the scanner 1, five mirror surfaces 2
Using a polygonal reflecting mirror 22 having 2a to 22e, an object to be read is scanned in five line directions via each mirror surface 22a to 22e. Therefore, due to differences in the positions, angles, and the like of the mirror surfaces 22a to 22e, in each of the five line directions,
The irradiation angle of the light for reading, the length of the optical path, and the amount of condensed light differ. Therefore, the reading performance is generally highest in the scanning direction via the mirror surface 22c arranged at the center of the polygon mirror 22.

Therefore, the hole plate 4 of the guide light irradiation unit 40
3, a slit may be formed instead of the substantially elliptical hole 43a, and guide light may be emitted so as to indicate a scanning range having the highest reading performance among the scanning ranges in five scanning directions. For example, as shown by a two-dot chain line in FIG. In this way, since the user can know the scanning direction with high reading performance, if the barcode arrangement direction is adjusted to the scanning direction, the barcode can be read more reliably. The reading work efficiency is improved.

Although the scanner 1 of the above embodiment scans in five line directions, the number of scanning directions is not particularly limited. It may scan in more than five line directions, or
Conversely, scanning may be performed in less than five line directions. Here, the smaller the number of scanning directions, the more the barcodes to be read are aligned with the scanning line direction when the barcode is moved toward the scanning direction in an appropriate direction. It is considered that the possibility that the barcode information cannot be read increases.

Therefore, especially when the number of scanning directions is small, if the guide light is applied so as to overlap each scanning range in each line direction as described above, the barcode arrangement direction is changed in the scanning direction. This is particularly effective because the barcode can be reliably read by matching.

Further, the scanner 1 of the above embodiment
Is a stationary type that scans a laser beam to read bar code information. However, the present invention can naturally be applied to a portable type called a portable type.
It is also applicable not to scanning a laser beam to read a one-dimensional code such as a bar code, but to irradiating the entire reading target with light and reading the image of the reading target from the reflected light with a CCD image sensor. it can. Further, in the above embodiment, red laser light is used as reading light, but light other than red light may be used as reading light.

In the scanner 1 of the above embodiment, blue light is used as the guide light. However, if the visible light has a wavelength different from that of the reading light and is not detected by the optical reading unit 8, Any color may be used. However, considering that blue and green have particularly high visibility, blue, green or light having a wavelength having the same visibility as the guide light is used as the guide light, in that the visibility of the guide light is higher. It is advantageous.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a schematic configuration of a barcode reading device according to an embodiment.

FIG. 2 is an explanatory diagram illustrating an optical reading unit of the barcode reading device.

FIG. 3 is an explanatory diagram illustrating scanning lines by an optical reading unit.

FIG. 4 is an explanatory diagram showing a guide light irradiation area by a guide light irradiation unit.

FIG. 5 is an explanatory diagram showing an irradiation area of guide light in another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Barcode reader (scanner) 5 ... Case 5a ... Reading window 5b ... Display window 6 ... Code 8 ... Optical reading part 10 ... Electrical circuit part 12 ... Laser diode 13 ... Plane mirror 14 ... Polygon mirror 14a-14d
... Mirror surface 16 ... Drive motor 18 ... Concave mirror 19 ... Optical filter 20 ... Photodiode 22 ... Polyhedral reflection mirrors 22a to 22e
... Mirror surface 40 ... Guide light irradiation part 41 ... High-intensity light emitting diode 42 ... Lens 42a ... Slope surface 43 ... Hole plate 43a ... Hole

Claims (7)

[Claims] A first light emitting means for emitting light; an irradiating means for irradiating the light emitted by the first light emitting means to an object to be read; and a light irradiating by the irradiating means and reflected by the object to be read. An optical information reading device comprising: a light receiving unit that receives the light emitted from the first light emitting unit; and a visible light that is not received by the light receiving unit. An optical information reading apparatus comprising: a second light emitting unit that emits light as guide light indicating a reading range of light to be emitted. 2. The optical information reading apparatus according to claim 1, wherein the guide light is blue, green, or light having a wavelength having the same luminous efficiency as the guide light. . 3. The optical information reading device according to claim 1, wherein the second light emitting means is configured using a light emitting diode. 4. The optical information reading device according to claim 1, wherein said second light emitting means emits said guide light and turns on / off / blinks said guide light. An optical information reading device configured to indicate an operation state. 5. An optical information reading apparatus according to claim 1, wherein said irradiating means has a multi-scan pattern in which light from said first light emitting means is sequentially scanned in a plurality of line directions. The second light emitting unit is configured to emit guide light indicating a predetermined line direction among the plurality of line directions together with the reading range. An optical information reading device, comprising: 6. The optical information reading apparatus according to claim 5, wherein said predetermined line direction is all directions of a plurality of line directions. 7. The optical information reading apparatus according to claim 5, wherein the predetermined line direction is a direction having the highest reading performance among the plurality of line directions. .